Hi,
I ran jarsigner -verify -verbose -certs my_application.apk on my apk to check whether it was signed in debug or release mode. This is a part of the result: X.509, C=US, O=Android, CN=Android Debug

The apk should be ready for Store submission, thus signed in release mode. I can’t seem to find any command for this, i believe the default behavior should be for it to be signed in release mode.
I can’t upload it the Play Store because of this.

That’s very interesting. I haven’t heard of this happening to any other users. We’ll try to repro internally, but first can you provide me with what versions of the exp CLI and Expo SDK you are using as well the build ID for the affected build?

Edit: Today i updated exp to 57.0.0, i rebuilt the app and cleared the credentials, then ran the command to check for the release mode, and the apk is actually in release mode now.
I was able to upload the apk on the store successfully.